Answer
Putting Brother = 70, we have:
Sister = 28.04 + 0.5206 (70) = 64.482
Since $r^{2} = 0.308$, we will not expect the prediction to be accurate.
Work Step by Step
Given above
The Basic Practice of Statistics 7th Edition
by Moore, David S.; Notz, William I.; Fligner, Michael A.
Published by
W. H. Freeman
ISBN 10:
146414253X
ISBN 13:
978-1-46414-253-6
Chapter 5 - Regression - Chapter 5 Exercises - Page 155: 5.37b
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